surface defect的用法和樣例：
例句
- With the augmentation of grain size, surface defects of the manganese zinc ferrite nanocrystallines minish, and intergranular free volume combines.
隨著粒徑的增大，納米晶的表面缺陷減小，晶界間的自由體積發生複合。 - Cracks leading to spalling were initiated at surface defects and boundaries between nitriding layes and the core.
導致剝落的疲勞裂紋開始於表面缺陷和氮化層與心部交界處。
